Intel Core i5-10600KF vs Intel Core i5-1240U Comparison

The Verdict

The benchmark data splits these two processors into clearly different roles. The Intel Core i5-10600KF wins 9 of 17 head-to-head tests, while the Intel Core i5-1240U wins 8, but the nature of those wins matters more than the count. The 10600KF dominates in sustained multi-core workloads, extended instruction execution, and data compression. The 1240U counters with superior single-thread scores, encryption throughput, and physics simulation.

For a desktop builder prioritizing raw compute in rendering and number-crunching, the 10600KF is the choice. Its Cinebench R23 multi-core score of 12003 versus 7902 for the 1240U is a 51.9% advantage, a decisive gap for CPU-bound tasks. The 10600KF also leads in PassMark extended instructions by 78.6% (14167 versus 7932) and random string sorting by 65.9% (26532 versus 15996), indicating strong vectorized and sorting workloads.

For mobile users, the 1240U offers a different profile. It wins PassMark single-thread with 3239 versus 2908 for the 10600KF, a 10.2% edge. It also leads in data encryption by 46.1% (8964 versus 4832) and physics by 17.4% (981 versus 810). These results suggest responsiveness in interactive tasks and efficient handling of cryptographic workloads.

The average benchmark scores tell a subtle story. The 10600KF averages 16228, while the 1240U averages 16957, placing the 1240U slightly ahead overall. Both chips sit at the 70th percentile among all CPUs. The 10600KF's nearest rivals include the Intel Core i7-10850H (0.2% ahead) and Intel Core 3 100U (0.5% ahead), while the 1240U sits near the AMD EPYC 7702 (0.1% ahead) and AMD EPYC 7742 (0.2% behind). These deltas are small, indicating the two processors occupy similar overall performance tiers despite their divergent strengths.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core i5-10600KF has a boost clock of 4.80 GHz, while the Intel Core i5-1240U boosts to 4.40 GHz.

Q: How do the core counts differ between these two chips?

A: The 10600KF has 6 cores and 12 threads, while the 1240U has 10 cores and 12 threads. Both support 12 threads, but the 1240U distributes them across more physical cores.

Q: Which processor is better for single-threaded performance?

A: The Intel Core i5-1240U wins in PassMark single-thread tests with 3239 versus 2908 for the 10600KF, a 10.2% advantage. However, the 10600KF wins Cinebench R23 single-core with 1694 versus 1559, an 8.7% lead.

Q: What memory types does each processor support?

A: The 10600KF supports DDR4 only, while the 1240U supports both DDR4 and DDR5.

Q: Does either processor include integrated graphics?

A: The 10600KF has no integrated graphics. The 1240U includes Iris Xe 80EU graphics.

Q: Which processor is more energy-efficient?

A: The 1240U has a TDP of 9 watts, compared to 95 watts for the 10600KF. This indicates the 1240U is designed for much lower power consumption.

Architecture Differences

The two processors come from different Intel generations and designs. The 10600KF uses Comet Lake architecture on a 14 nm process node, while the 1240U uses Alder Lake architecture on a 10 nm node. This process difference is fundamental: the newer 10 nm node allows for denser transistors and different power characteristics.

The cache layouts diverge significantly. The 10600KF has 64 KB of L1 cache per core and 256 KB of L2 per core, with 12 MB of shared L3. The 1240U has 80 KB of L1 per core and a much larger 1.25 MB of L2 per core, also with 12 MB of shared L3. The larger per-core L2 on the 1240U reflects its hybrid architecture, which mixes different core types.

The memory ecosystem differs as well. The 10600KF supports DDR4 with dual-channel memory and a memory bandwidth of 42.7 GB/s. The 1240U supports both DDR4 and DDR5, also dual-channel, though its memory bandwidth is not recorded in the database. PCIe support also varies: the 10600KF uses Gen 3 with 16 lanes from the CPU, while the 1240U uses Gen 4.

The 10600KF is a desktop chip with a socketed design (Intel Socket 1200), while the 1240U is a mobile chip soldered to the board (Intel BGA 1781). The 10600KF has an unlocked multiplier for overclocking; the 1240U does not. The 1240U includes integrated Iris Xe 80EU graphics, while the 10600KF has no integrated graphics at all.

Specification Differences

The core and thread counts are a key divergence: 6 cores and 12 threads for the 10600KF versus 10 cores and 12 threads for the 1240U. The 1240U has more physical cores but the same thread count, suggesting a mix of performance and efficiency cores.

Clock speeds differ notably. The 10600KF has a base clock of 4.10 GHz and a boost of 4.80 GHz. The 1240U has a base clock of 1100.00 MHz (which appears to be a low-power baseline) and a boost of 4.40 GHz. The 10600KF runs at higher clocks across the board.

Power envelopes are dramatically different. The 10600KF has a TDP of 95 watts; the 1240U has a TDP of 9 watts. This is a 10x difference in rated power consumption, reflecting the mobile versus desktop design philosophy.

The manufacturing process separates them: 14 nm for the 10600KF, 10 nm for the 1240U. The cache hierarchy differs as described above. Memory support, PCIe generation, socket type, and integrated graphics all differ between the two.

Release dates are also distinct: the 10600KF launched on 2020-04-29, while the 1240U launched on 2022-02-22. Both are listed as active in production.

Head-to-Head Benchmarks

The Cinebench R23 multi-core test shows the largest delta. The 10600KF scores 12003 versus 7902 for the 1240U, a 51.9% lead. This is the clearest statement of sustained multi-threaded capability in the dataset. The R15 multi-core test flips the result, however: the 1240U scores 1242 versus 1209 for the 10600KF, a 2.7% edge. The R20 multi-core test nearly ties: 5041 for the 10600KF versus 5013 for the 1240U, a 0.6% win for the 10600KF.

Single-core results are mixed across tests. In Cinebench R15 single-core, the 1240U wins with 226 versus 170, a 24.8% margin. In R20 single-core, the 10600KF wins by a hair: 711 versus 707, a 0.6% edge. In R23 single-core, the 10600KF leads 1694 versus 1559, an 8.7% advantage. PassMark single-thread shows the 1240U ahead at 3239 versus 2908, a 10.2% margin.

PassMark tests reveal distinct strengths. The 10600KF wins data compression by 47.9% (211643 versus 143102), extended instructions by 78.6% (14167 versus 7932), integer math by 5.6% (47508 versus 44968), multithread by 5.7% (14169 versus 13406), and random string sorting by 65.9% (26532 versus 15996). The 1240U wins data encryption by 46.1% (8964 versus 4832), find prime numbers by 28.6% (63 versus 45), floating point math by 0.7% (29726 versus 29521), physics by 17.4% (981 versus 810), and single-thread by 10.2% (3239 versus 2908).

The 3DMark tests appear only for the 10600KF in the database, with scores of 5359 for 16 threads, 1554 for 2 threads, 2947 for 4 threads, 4513 for 8 threads, 5364 for max threads, and 799 for single thread. These provide additional context for the desktop chip but cannot be compared directly to the 1240U.

Where Each One Wins

The 10600KF wins in scenarios demanding sustained multi-core compute. Its 51.9% lead in Cinebench R23 multi-core, 47.9% lead in data compression, and 78.6% lead in extended instructions point to rendering, scientific simulation, and heavy vectorized workloads. The integer math and multithread wins (5.6% and 5.7%) reinforce this profile. The random string sorting advantage of 65.9% indicates strength in data processing tasks involving sorting and organization.

The 1240U wins in interactive and security-focused scenarios. Its 10.2% single-thread advantage in PassMark and 24.8% lead in Cinebench R15 single-core suggest snappy responsiveness in applications that rely on single-core speed. The 46.1% encryption advantage and 28.6% lead in prime number finding indicate strong cryptographic and mathematical operations. The 17.4% physics win suggests better performance in physics simulation workloads.

The power envelope is a decisive factor. The 1240U's 9-watt TDP versus 95 watts for the 10600KF means the mobile chip is suited for thin-and-light laptops with limited cooling and battery constraints. The 10600KF requires substantial desktop cooling and power delivery, but delivers higher multi-core throughput where it matters. Users who prioritize battery life, portability, and integrated graphics will find the 1240U compelling. Users who need maximum multi-threaded rendering and computational throughput should choose the 10600KF.

The data shows a split decision. The 10600KF covers 9 wins and the 1240U covers 8 wins, but the magnitude of the 10600KF's wins in multi-core tests is larger than the 1240U's wins in single-core tests. The 1240U's average benchmark score of 16957 is higher than the 10600KF's 16228, yet the 10600KF's multi-core dominance is more pronounced. The choice depends entirely on the workload and platform.